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vmath.hpp/untests/vmath_mat_fun_tests.cpp

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/*******************************************************************************
* This file is part of the "https://github.com/blackmatov/vmath.hpp"
* For conditions of distribution and use, see copyright notice in LICENSE.md
* Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
******************************************************************************/
#include "vmath_tests.hpp"
#include "doctest/doctest.hpp"
namespace
{
using namespace vmath_hpp;
using namespace vmath_tests;
template < typename T, int Size >
constexpr mat<T, Size> generate_frank_matrix() {
mat<T, Size> m;
for ( int i = 1; i <= Size; ++i ) {
for ( int j = 1; j <= Size; ++j ) {
if ( j < i - Size ) {
m[i - 1][j - 1] = 0;
} else if ( j == (i - 1) ) {
m[i - 1][j - 1] = Size + 1 - i;
} else {
m[i - 1][j - 1] = Size + 1 - j;
}
}
}
return m;
}
}
TEST_CASE("vmath/mat_fun") {
SUBCASE("detail") {
STATIC_REQUIRE(map_join([](const int2& x){
return x * 2;
}, int2x2{}) == int2x2(2,0,0,2));
STATIC_REQUIRE(map_join([](const int2& x, const int2& y){
return x + y;
}, int2x2{}, int2x2{}) == int2x2(2,0,0,2));
STATIC_REQUIRE(map_join([](const int2& x, const int2& y, const int2& z){
return x + y + z;
}, int2x2{}, int2x2{}, int2x2{}) == int2x2(3,0,0,3));
STATIC_REQUIRE(fold_join([](int acc, const int2& x){
return acc + x.x;
}, 0, int2x2{}) == 1);
STATIC_REQUIRE(fold_join([](int acc, const int2& x, const int2& y){
return acc + x.x + y.x;
}, 0, int2x2{}, int2x2{}) == 2);
STATIC_REQUIRE(fold1_join([](const int2& acc, const int2& x){
return acc + x;
}, int2x2{}) == int2(1,1));
}
SUBCASE("operators") {
STATIC_REQUIRE(-int2x2(1,2,3,4) == int2x2(-1,-2,-3,-4));
STATIC_REQUIRE(!int2x2(-1,0,1,2) == bool2x2(false,true,false,false));
STATIC_REQUIRE(int2x2(1,2,3,4) + 2 == int2x2(3,4,5,6));
STATIC_REQUIRE(int2x2(1,2,3,4) - 2 == int2x2(-1,0,1,2));
STATIC_REQUIRE(int2x2(1,2,3,4) * 2 == int2x2(2,4,6,8));
STATIC_REQUIRE(int2x2(1,2,3,4) / 2 == int2x2(0,1,1,2));
STATIC_REQUIRE(4 + int2x2(1,2,3,4) == int2x2(5,6,7,8));
STATIC_REQUIRE(4 - int2x2(1,2,3,4) == int2x2(3,2,1,0));
STATIC_REQUIRE(4 * int2x2(1,2,3,4) == int2x2(4,8,12,16));
STATIC_REQUIRE(4 / int2x2(1,2,3,4) == int2x2(4,2,1,1));
STATIC_REQUIRE(int2x2(1,2,3,4) + int2x2(5,6,7,8) == int2x2(6,8,10,12));
STATIC_REQUIRE(int2x2(1,2,3,4) - int2x2(5,6,7,8) == int2x2(-4,-4,-4,-4));
STATIC_REQUIRE(int2x2(5,6,7,8) / int2x2(1,2,3,4) == int2x2(5,3,2,2));
STATIC_REQUIRE(int2x2() * int2x2() == int2x2());
STATIC_REQUIRE(int3x3() * int3x3() == int3x3());
STATIC_REQUIRE(int2(1,2) * int2x2() == int2(1,2));
STATIC_REQUIRE(int3(1,2,3) * int3x3() == int3(1,2,3));
STATIC_REQUIRE(int4(1,2,3,4) * int4x4() == int4(1,2,3,4));
{
int2x2 v{1,2,3,4};
REQUIRE(&v == &(v += 3));
REQUIRE(v == int2x2{4,5,6,7});
REQUIRE(&v == &(v += int2x2{1,2,3,4}));
REQUIRE(v == int2x2{5,7,9,11});
}
{
int2x2 v{4,5,6,7};
REQUIRE(&v == &(v -= 3));
REQUIRE(v == int2x2{1,2,3,4});
REQUIRE(&v == &(v -= int2x2{2,4,6,8}));
REQUIRE(v == int2x2{-1,-2,-3,-4});
}
{
int2x2 v{1,2,3,4};
REQUIRE(&v == &(v *= 3));
REQUIRE(v == int2x2{3,6,9,12});
}
{
int2x2 v{6,18,36,60};
REQUIRE(&v == &(v /= 2));
REQUIRE(v == int2x2{3,9,18,30});
REQUIRE(&v == &(v /= int2x2{3,4,3,10}));
REQUIRE(v == int2x2{1,2,6,3});
}
{
int4 v{0, 0, 0, 1};
REQUIRE(&v == &(v *= translate(int3{1,2,3})));
REQUIRE(v == approx4(1,2,3,1));
}
{
int3 v{1, 2, 3};
REQUIRE(&v == &(v *= int3x3(scale(int3{2,3,4}))));
REQUIRE(v == int3(2,6,12));
}
{
int4x4 v = translate(int3{1, 2, 3});
REQUIRE(&v == &(v *= translate(int3{1,2,3})));
REQUIRE(v == translate(int3{2,4,6}));
}
{
int3x3 v = int3x3(scale(int3{1, 2, 3}));
REQUIRE(&v == &(v *= int3x3(scale(int3{2,3,4}))));
REQUIRE(v == int3x3(scale(int3{2,6,12})));
}
}
SUBCASE("transpose") {
STATIC_REQUIRE(transpose(int2x2(
1, 2,
3, 4
)) == int2x2(
1, 3,
2, 4
));
STATIC_REQUIRE(transpose(int3x3(
1, 2, 3,
4, 5, 6,
7, 8, 9
)) == int3x3(
1, 4, 7,
2, 5, 8,
3, 6, 9
));
STATIC_REQUIRE(transpose(int4x4(
1, 2, 3, 4,
5, 6, 7, 8,
9, 10, 11, 12,
13, 14, 15, 16
)) == int4x4(
1, 5, 9, 13,
2, 6, 10, 14,
3, 7, 11, 15,
4, 8, 12, 16
));
}
SUBCASE("determinant") {
constexpr int2x2 m2{1,2,3,4};
constexpr int3x3 m3{1,2,3,4,5,6,7,8,9};
constexpr int4x4 m4{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16};
STATIC_REQUIRE(determinant(m2) == determinant(transpose(m2)));
STATIC_REQUIRE(determinant(m3) == determinant(transpose(m3)));
STATIC_REQUIRE(determinant(m4) == determinant(transpose(m4)));
STATIC_REQUIRE(determinant(generate_frank_matrix<int, 2>()) == 1);
STATIC_REQUIRE(determinant(generate_frank_matrix<int, 3>()) == 1);
STATIC_REQUIRE(determinant(generate_frank_matrix<int, 4>()) == 1);
STATIC_REQUIRE(determinant(transpose(generate_frank_matrix<int, 2>())) == 1);
STATIC_REQUIRE(determinant(transpose(generate_frank_matrix<int, 3>())) == 1);
STATIC_REQUIRE(determinant(transpose(generate_frank_matrix<int, 4>())) == 1);
}
SUBCASE("inverse") {
STATIC_REQUIRE(inverse(float2x2()) == float2x2());
STATIC_REQUIRE(inverse(float3x3()) == float3x3());
STATIC_REQUIRE(inverse(float4x4()) == float4x4());
STATIC_REQUIRE(inverse(float2x2(0.5)) == float2x2(2.f));
STATIC_REQUIRE(inverse(float3x3(0.5)) == float3x3(2.f));
STATIC_REQUIRE(inverse(float4x4(0.5)) == float4x4(2.f));
{
constexpr float4x4 m1 = translate(float3(1.f, 2.f, 3.f));
constexpr float4x4 rm1 = inverse(m1);
STATIC_REQUIRE(all(equal_to(
unit4_z<float> * m1 * rm1,
unit4_z<float>,
approx_epsilon_v<float>)));
}
{
const float3 axis2 = normalize(float3(1.f, 2.f, 3.f));
const float4x4 m2 = rotate(0.5f,axis2);
const float4x4 rm2 = inverse(m2);
REQUIRE(all(equal_to(
unit4_z<float> * m2 * rm2,
unit4_z<float>,
approx_epsilon_v<float>)));
}
{
const float3 axis3 = normalize(float3(1.f, 2.f, 3.f));
const float3x3 m3 = float3x3(rotate(0.5f,axis3));
const float3x3 rm3 = inverse(m3);
REQUIRE(all(equal_to(
unit3_z<float> * m3 * rm3,
unit3_z<float>,
approx_epsilon_v<float>)));
}
{
const float3 axis4 = normalize(float3(0.f, 0.f, 3.f));
const float2x2 m4 = float2x2(rotate(0.5f,axis4));
const float2x2 rm4 = inverse(m4);
REQUIRE(all(equal_to(
unit2_y<float> * m4 * rm4,
unit2_y<float>,
approx_epsilon_v<float>)));
}
}
}
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